Fledgling advice - Urgent!

Thanks Paul. Sadly it had passed away by this morning, which is what I expected really. It must have had quite a whack and - although this is probably too much information - it was actually lying on its side and its head had stuck to the bottom of the carboard box from some sort of wound oozing. I don't think there is anything that could have been done to save it after it hit the window, just hope it didn't suffer too much overnight. Perhaps it would have been kinder to finish the job last night but then again it didn't seem stressed - just very dazed.